Pump screen



Patented July 22, 1924;,

PATENT OFFICE.

MARTIN ROBERT DONNALLAN, 0F LONG BEACH, CALIFORNIA.

PUMP SCREEN.

Application filed July 23, 1928. Serial No. 653,394.

.To all whom it may concern:

Be it known that I, MARTIN ROBERT DoN- NALLAN, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and State of California, have inented certain new and useful Improvements in 'Pump Screens, of which the followingis a specification.

This invention relates to a pump screen, designed primarily for use 1n connectlon with mud pumps employed for the extraction of theformation which is necessarily attendant in oil well drilling operations, but it is to be understood, however, that a pump screen in accordance with this invention can be employed for any purposes wherein it is found applicable, and the invention has for its object to provide, in a manner as hereinafter set forth, a pump screen for increasing the life of the valves, valve seats and inserts of, as well as preventing any retardation or interruption of the operation, of the pump by the elimination of the entrance of rock, gravel, wood chips, which ordinarily wouldwith the suction applied,

enter in to the pump and cause thereby the I clogging thereof, injury to the valves, as well as to the valve seats andinserts, and which further requires a constant taking apart of the pump, the replacement of the valve and the valve seats, but more es-- to, a pump screen forthe purpose set forth,

which is simple in its construction and 31', rangement, strong, durable, capable of being quickly arranged in operativerelation with respect to the pump and removed there from when occasion so requlres, thoroughly efficient and convenient inits use and comparatively inexpensive.

W iththe foregoing'and other objects in view, the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying collar 2.

tion of a pump, showing the adaptation therewith of a" screen in accordance with this invention.

Figure 2 is a section on line 22, Figure 1.

Figure3 is a top plan view of the screen element. Q

Figure t is a side elevation element. I a Figure Sis a side elevation of'a modified form of screen element.

Figure 6 is an elevationvof clamping members.

Referring to the drawings in detail, 1 denotes the main shaft of the pump and which is adapted to have secured against the inlet end thereof ascreen element in accordance with this invention.

The screen, element as. illustrated in Figures 1, 3 and 4 comprises a collar 2, formed with a pairof oppositely disposed laterally extending lugs 23, 4, arranged in the same plane and each provided with a vertically disposed opening 5 which has its lower end communicating with a semi-spherical recess with the wall thereof indicated at G and constituting aseat. The wall of of the screen one of the the opening formed by the collar 2 is of two different diameters, and that portion of larger diameter is indicated at 7, and the portion of smaller diameter at 8. The portion 7 of greaterdiameter is of. greater height than the portion 8 of smaller diameter. The providing of the wall of the opening formed by the collar of tw ..;diiferent from the lower terminus of the portion 7 of greater'd ameter,andmerges in the upper terminus of the portion '8 of smaller di- 'ameter. 1 Formed integral with the collar 2, as well as depending therefrom a foraminous member of semi-spherical contour and which is indicated at 10. The diameter at the upper end of the member 10 is greater than the diameter of the opening formed by the The member 10 is perforated.

diameters provides. a seat 9, which extends throughout, as indicated at 11, and the perforations are graduated in size from the base to the top of the member 10. The perforations 11 are circular in contour and with the perforations f smaller diameter being positioned at the base of the member 10 and the perforations of greater diameter are arranged at the top of the member 10. The

top of the member 10 surrounds the lower end of the opening formed by the collar 2, and the inner face, at the top of the member -10, is spaced throughout from the portion 8 i. of the member 12 and the larger perforations at the top thereof.

The main shaft 1 of the pump has its lower end extended into the opening formed by the collar 2, and with the lower edge of said shaft 1 mounted against the seat 9, as shown inFigure 1. By this arrangement the collar 2 not only abuts against the shaft 1, but also overlaps the terminal portion thereof and when the collar 2 is mounted in such position the inlet end of the shaft 1, is protectedby the foraminous member 10 or '12, thereby preventing the entrance of rock,

gravel or other debris to the pump. 7

The screen" element is detachably connected with the shaft 1 through the medium of a combined coupling and clamping device, and which includes a pair of coupling rods 14, 15, each having the lower end formed with a globular enlargement 16, positioned against the seat 6 when the rods 14 and 15 are mounted in coupling position. The upper portion of the rod 14, as well as the rod 15, is peripherally threaded, as at 17 and carries an abutment nut 18, a washer 19 and a clamping nut which may be of any suitable construction, but as shown by way of example, of the winged type and which is indicated at 20. i v

The combined coupling and clamping de-' vice further includes a pair of oppositely extending semi-circular clamping members 21, 22, each having its inner face formed with tapering threads 23 for biting into the periphery ofthe shaft 1 so as to obtain a firm hold thereon and to prevent slipping of the clamping members 21, 22, relative to the shaft 1.v Each of the clampingmembers formed with a pair of oppositely extending laterally disposed flanges 24, 25, and when the members 21, 22 are positioned against the shaft 1, the flanges 24,125 of one clamping member oppose the flanges 24, 25 of the other clamping member, but are spaced therefrom, in a manner as shown in Figure Each flange 24, as well as each flange 25, is provided with an opening 26 and when the clamping members 21, 22, are positioned against the shaft 1, the openings 26 of the flanges 24 oppose each other and the openings 26 of the flanges 25 oppose each other. When the clamping members 21, 22, are positioned against the shaft 1, the coupling rod 14 is extended upwardly between the flanges 24 and the coupling rod 15 is extended up between the opposed flanges 25. V

The combined coupling and clamping device further includes a pair of clamping bolts 27, 28, and each of which carries a securing nut- 29. The bolt 27 extends through the openings 26 of the flanges 24,

and the bolt 28 extends through the openings 26 of the flanges 25. The bolts 27 and 28 and nuts 29 are employed for securing the clamping members 21, 22 to the shaft 1, and the said clamping members 21, 22, are not removed from the shaft 1, when the screen element is disconnected from the shaft 1 for the purpose of cleaning such element.

The coupling rods 14, 15, are secured to the flanges 24 and 25, for the purpose of maintaining the screen element against the end of the shaft 1, as shown in Figure 1, by the positioning of. the nuts 18 against the lower edges of the flanges 24 and 25 and the further adjusting the nuts 20 and w,ash-' ers 19 on the rods l4and 15, so that the washers 19 will be securely clamped against the upper edges of the flanges 24, 25, in a manner as shown in Figure 1, whereby the screen element 10 will be fixedly secured in operative position with respect to the inlet end of theshaft 1.

The nuts 18 prevent the washers 19 from falling down on the rods 14, 15 into the mud when the screen element is disconnected fromcthe shaft 1.

he spherical enlargements 16 at the lower ends of the rods 14, 15, in connection with the seat 6 provide fulcrums upon which the coupling rods can be shifted thereby facilitating the removal of said rods between the flanges 24, 25, when it is desired to disconnect the screen from' the lower end of the shaft 1.

' Although the foraminous member 10 is of semi-spherical contour which is the preferred shape for said'member, yet the same can be of conoidal shape if desired, and furthermore the perforations formed in said member 10 M12 can also be of any shape desired, and although the preferred embodiment of the invention is as described and illustrated, yet it is tobe understood that changes in the details of construction can be had which will fall within the light of the invention as claimed.-

VVhat I claim is 2-- 1. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be positioned the edge of the inlet end of the main shaft of the pump, said collar overlapping and extended from said end, a hollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of a pump shaft, and means connected with said collar for detachably connecting it to the main shaft of the pump.

2. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be po sitioned th edge of the inlet end of the main shaft of the pump, said collar overlapping and extended from said end, ahollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of apump shaft, a clamping element adapted to be fixedly secured to said shaft, and means pivotally connected with said collar for coupling it with said clamping element, said means carrying adjustable securing nuts cooperating with said clamping element for detachably connecting said means therewith.

3. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be positioned the edge of the inlet end of the main shaft of the pump, said collar overlapping and extended from said end, a hollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of a pump shaft, and means connected with said collar for detachably connecting it to the main shaft of the pump, the openings in said foraminous element being of varying sizes.

4. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be positioned the edge of the inlet end of the main shaft of the pump, said collar overlapping and extended from said end, a hollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of a pump shaft, a clamping element adapted to be fixdly secured to said shaft, and means pivotally connected with said collar for coupling it with said clamping element, said means carrying adjustable securing nuts cooperating with said clamp ing element for detachably connecting said means therewith, the openings in said foraminous element being of varying sizes.

5. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be positioned the edge of the inlet and of the main shaft of the pump, said collar overlapping and extended from said end, a hollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of a pump shaft, and means connected with said collar for detachably connecting it to the main shaft of the pump, the 'openings in said foraminous element being of varying sizes and with the openings of smaller size being arranged at the outer end of said foraminous element.

6. A pump screen comprising a collar having its inner edge formed with an annular seat against which is adapted to be positioned the edge of the inlet end of the main shaft of the pump, said collar overlapping and extended from said end, a hollow foraminous element integral with and extended from the lower face of said collar and controlling the entrance of material to the inlet end of a pump shaft, a clamping element adapted to be fixedly secured to said shaft, and means pivotally connected with said collar for coupling it with said clamping element, said means carrying adjustable securing nuts cooperating with said clamping element for detachably connecting said means therewith, the openings in said foraminous element being of varying sizes, and with the openings of smaller size being arranged at the outer end of said foraminous element.

In testimony whereof, I afiix my signature hereto.

MARTIN ROBERT DONNALLAN. 

